: I have an old set of steel strings on my bass...the tailpiece thread is red and the top of the string has purple thread? What are these and what kind of strings have red at the bottom and the top? Thanks

They are probably two different flavors of Thomastik Spirocores. Just put them on a bass I'm selling.

Visit www.quinnviolins.com - he has a page where you can enter the thread characteristics of strings and get a return of what they may be.